[Pharo-dev] failing test in writing files

Hi there, I have a failing test and was wondering if anyone would have a sense as to why: | testString filename file | testString := 'ascii String'. filename := 'test-file-' , 99 atRandom printString , '.txt'. filename asFileReference ensureDelete. file := filename asFileReference writeStreamDo: [ :stream | stream nextPutAll: testString; crlf ]. self assert: file species = FileStream. Many thanks, Sheri